Home / 3,121.54-4,306.18-1,862.20

Finding the Fourth Proportional to 3,121.54, 4,306.18 and 1,862.20

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Solution

The fourth proportional to 3,121.54, 4,306.18 and 1,862.20 is: 2,568.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.54 : 4,306.18 = 1,862.20 : x
  2. Step 2: Convert to fraction form
    3,121.54/4,306.18 = 1,862.20/x
  3. Step 3: Cross multiply
    3,121.54x = 4,306.18 × 1,862.20
  4. Step 4: Simplify right side
    3,121.54x = 8,018,968.40
  5. Step 5: Solve for x
    x = 8,018,968.40/3,121.54
  6. Step 6: Final answer
    x = 2,568.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.